%0 Journal Article
%A V. V. Lychagin
%T On sufficient orbits of a group of contact diffeomorphisms
%J Sbornik. Mathematics
%D 1977
%P 223-242
%V 33
%N 2
%U http://geodesic.mathdoc.fr/item/SM_1977_33_2_a3/
%G en
%F SM_1977_33_2_a3